20-liter roll-top/compression strap dry bag with an air-permeable base—air can be pushed out, but water can’t get in—and four straps for even compression of gear for backpacking, camping, and water sports Manufactured from bluesign-approved lightweight PU-coated 70D nylon, with a valve-free expelling 40D nylon air permeable/waterproof base; 10,000mm waterhead (the higher the waterhead rating, the more waterproof the fabric) Reinforced waterproof seams are double-stitched, and tape sealed; light-reflecting white interior for better visibility of bag contents Low-profile, streamlined shape saves space, and oval base resists rolling; patent-pending field repair buckle can be replaced in seconds; compression straps have two ladderlock and two side-release buckles 20-liter compression dry bag measures 10.4 x 9.3 x 18 inches when closed, and weighs 0.35 pounds; volume is 20 liters (with closure rolled three times) The Sea to Summit Evac Compression Dry Bag is a lightweight, roll-top/compression strap dry bag with an air-permeable base—air can be pushed out, but water can’t get in—and four straps for even compression. Ideal for backpacking, sea kayaking, and travelling, the valve-free expelling design works along with the straps to compress bulky clothing or gear, by rolling and pushing out excess air and cinching down the straps. Manufactured from bluesign-approved lightweight PU-coated 70D nylon, and a 40D nylon air permeable/waterproof base, with a 10,000mm waterhead (the higher the waterhead rating, the more waterproof the fabric), its reinforced waterproof seams are double-stitched, and tape sealed, with reinforced stitching at stress points. A waterproof Hypalon roll-top closure, and four straps featuring two ladderlock and two side-release buckles, keeps gear compact and secure. The Sea to Summit eVac Compression Dry Bag’s low-profile, streamlined shape saves space, and its oval base resists rolling. A patent-pending field repair buckle can be replaced in seconds with a Phillips screwdriver. Available in five sizes: 5 liter, 8 liter, 13 liter, 20 liter, and 35 liter, to carry everything from small essentials to group gear. Sea to Summit products are guaranteed against defects in materials or workmanship for the lifetime of the product.